1. What is CNC Feed Rate Calculation?

The CNC feed rate calculation determines how fast the cutting tool moves through the material. Proper feed rate is essential for optimal cutting performance, tool life, and surface finish.

2. How Does the Calculator Work?

The calculator uses the feed rate formula:

Where:

• \( N_{teeth} \) — Number of cutting teeth on the tool
• \( RPM \) — Spindle speed in revolutions per minute
• \( ChipLoad \) — Amount of material each tooth removes per revolution (mm/tooth)

Explanation: The formula calculates the linear speed (mm/min) at which the cutter moves through the material based on tool geometry and spindle speed.

3. Importance of Feed Rate Calculation

Details: Correct feed rate prevents tool breakage, ensures good surface finish, optimizes material removal rate, and extends tool life. Too slow causes rubbing; too fast causes tool breakage.

4. Using the Calculator

Tips: Enter number of teeth (1 for single-point tools), spindle RPM, and recommended chip load for your material/tool combination. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is chip load?
A: Chip load is the thickness of material removed by each cutting edge during a revolution, typically provided by tool manufacturers for different materials.

Q2: How does feed rate affect machining?
A: Higher feed rates increase productivity but may reduce tool life. Lower feed rates improve finish but increase machining time.

Q3: What are typical chip loads?
A: Varies by material and tool: 0.05-0.1mm for aluminum, 0.03-0.08mm for steel, 0.02-0.05mm for titanium (always check manufacturer recommendations).

Q4: Should I adjust feed rate for different operations?
A: Yes, roughing can use higher feed rates than finishing. Slotting may require reduced feed rates compared to peripheral milling.

Q5: How does tool material affect feed rate?
A: Carbide tools can generally run at higher feed rates than HSS tools for the same application.